Remove dead code.

This logic was introduced as part of change I92dfb39289a359f49caa02c2caf8baf66098fb59
but isn't used anymore.

Change-Id: I5bcfea99a7a2993434e1e978195a70dae52d6cfa
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@nokia.com>

src/gui/text/qfont.cpp

@@ -2733,20 +2733,6 @@ void QFontCache::updateHitCountAndTimeStamp(Engine &value)
              value.data->name());
 }
 
-void QFontCache::removeEngine(QFontEngine *engine)
-{
-    EngineCache::iterator it = engineCache.begin();
-    while (it != engineCache.end()) {
-        if (it.value().data == engine) {
-            it = engineCache.erase(it);
-            if (--engine->cache_count == 0)
-                decreaseCost(engine->cache_cost);
-        } else {
-            ++it;
-        }
-    }
-}
-
 void QFontCache::insertEngine(const Key &key, QFontEngine *engine, bool insertMulti)
 {
     FC_DEBUG("QFontCache: inserting new engine %p", engine);

src/gui/text/qfont_p.h

@@ -245,7 +245,6 @@ public:
 
     void updateHitCountAndTimeStamp(Engine &value);
     void insertEngine(const Key &key, QFontEngine *engine, bool insertMulti = false);
-    void removeEngine(QFontEngine *engine);
 
     private:
     void increaseCost(uint cost);

src/gui/text/qfontengine.cpp

@@ -1421,22 +1421,6 @@ bool QFontEngineMulti::shouldLoadFontEngineForCharacter(int at, uint ucs4) const
     return true;
 }
 
-void QFontEngineMulti::unloadEngine(int at)
-{
-    QFontEngine *fontEngine = engines.at(at);
-    if (fontEngine == 0)
-        return;
-
-    // If there are other references to the engine, keep it around and keep the reference
-    if (fontEngine->ref.load() == 1) {
-        QFontCache::instance()->removeEngine(fontEngine);
-        if (fontEngine->cache_count == 0) {
-            delete fontEngine;
-            engines[at] = 0;
-        }
-    }
-}
-
 glyph_metrics_t QFontEngineMulti::boundingBox(const QGlyphLayout &glyphs)
 {
     if (glyphs.numGlyphs <= 0)

src/gui/text/qfontengine_p.h

@@ -401,7 +401,6 @@ protected:
     friend class QPSPrintEngineFontMulti;
     friend class QRawFont;
     virtual void loadEngine(int at) = 0;
-    virtual void unloadEngine(int at);
     QVector<QFontEngine *> engines;
 };